[MSDN Library June 1998] X25-Leased-or-Switched (100%)

MSDN Library Visual Studio 6.0 > Platform SDK > Database and Messaging Services > Microsoft Exchange Server > Microsoft Exchange Server Programmer's Reference > Reference > Directory Schema > Directory Schema Attributes

[MSDN Library June 1998] X25-Leased-Line-Port (87.5%)

MSDN Library Visual Studio 6.0 > Platform SDK > Database and Messaging Services > Microsoft Exchange Server > Microsoft Exchange Server Programmer's Reference > Reference > Directory Schema > Directory Schema Attributes

[MSDN Library June 1998] X25-Remote-MTA-Phone (82.9545454545455%)

MSDN Library Visual Studio 6.0 > Platform SDK > Database and Messaging Services > Microsoft Exchange Server > Microsoft Exchange Server Programmer's Reference > Reference > Directory Schema > Directory Schema Attributes

[MSDN Library June 1998] X25-Call-User-Data-Incoming (82.4074074074074%)

MSDN Library Visual Studio 6.0 > Platform SDK > Database and Messaging Services > Microsoft Exchange Server > Microsoft Exchange Server Programmer's Reference > Reference > Directory Schema > Directory Schema Attributes

[MSDN Library June 1998] X25-Call-User-Data-Outgoing (82.4074074074074%)

MSDN Library Visual Studio 6.0 > Platform SDK > Database and Messaging Services > Microsoft Exchange Server > Microsoft Exchange Server Programmer's Reference > Reference > Directory Schema > Directory Schema Attributes